public void Delete_From_InternalNode_BorrowTheGreatestLowerBoundCausesHalfLeafToBeEmpty()
{
var tree = new TTree <int>(3, 3);
tree.Add(10);
tree.Add(11);
tree.Add(12);
tree.Add(4);
tree.Add(5);
tree.Add(6);
tree.Add(16);
tree.Add(17);
tree.Add(18);
tree.Add(1);
tree.Add(2);
tree.Add(3);
tree.Remove(4);
tree.Remove(5);
tree.Remove(10);
CheckTree <int>(tree.RootNode, 1, new[] { 6, 11, 12 }, true, true, null, 6);
CheckTree <int>(tree.RootNode.Left, 0, new[] { 1, 2, 3 }, false, false, tree.RootNode, 6);
CheckTree <int>(tree.RootNode.Right, 0, new[] { 16, 17, 18 }, false, false, tree.RootNode, 6);
}
private void m_deleteButton_Click(object sender, EventArgs e)
{
m_root.Remove(int.Parse(m_valueTextBox.Text));
Redraw();
ActiveControl = m_valueTextBox;
m_valueTextBox.SelectAll();
}
public void Delete_From_Leaf_RemovesItem()
{
var tree = new TTree <int>(3, 3);
tree.Add(10);
tree.Add(5);
tree.Add(15);
tree.Remove(10);
CheckTree <int>(tree.RootNode, 0, new[] { 5, 15 }, false, false, null, 5);
}
public void Delete_From_HalfLeaf_Merges()
{
var tree = new TTree <int>(3, 3);
tree.Add(10);
tree.Add(11);
tree.Add(12);
tree.Add(5);
tree.Remove(12);
CheckTree <int>(tree.RootNode, 0, new[] { 5, 10, 11 }, false, false, null, 5);
}
public void Delete_From_InternalNode_BorrowTheGreatestLowerBound_WhenLeafBecomesEmpty()
{
var tree = new TTree <int>(3, 3);
tree.Add(10);
tree.Add(11);
tree.Add(12);
tree.Add(4);
tree.Add(15);
tree.Remove(11);
CheckTree <int>(tree.RootNode, 1, new[] { 4, 10, 12 }, false, true, null, 4);
CheckTree <int>(tree.RootNode.Right, 0, new[] { 15 }, false, false, tree.RootNode, 4);
}
public void Delete_From_HalfLeaf_RemovesItem()
{
var tree = new TTree <int>(3, 3);
tree.Add(10);
tree.Add(11);
tree.Add(12);
tree.Add(4);
tree.Add(5);
tree.Remove(12);
CheckTree <int>(tree.RootNode, 1, new[] { 10, 11 }, true, false, null, 10);
CheckTree <int>(tree.RootNode.Left, 0, new[] { 4, 5 }, false, false, tree.RootNode, 10);
}
public void Delete_From_NodeNoUnderflow_RemovesItem()
{
var tree = new TTree <int>(2, 3);
tree.Add(10);
tree.Add(11);
tree.Add(12);
tree.Add(4);
tree.Add(5);
tree.Remove(11);
CheckTree <int>(tree.RootNode, 1, new[] { 10, 12 }, true, false, null, 10);
CheckTree <int>(tree.RootNode.Left, 0, new[] { 4, 5 }, false, false, tree.RootNode, 10);
}
public void Delete_From_RightLeaf_BecomesEmpty()
{
var tree = new TTree <int>(2, 3);
tree.Add(1);
tree.Add(2);
tree.Add(3);
tree.Add(4);
tree.Add(5);
tree.Add(6);
tree.Add(7);
tree.Remove(7);
CheckTree <int>(tree.RootNode, 1, new[] { 4, 5, 6 }, true, false, null, 4);
CheckTree <int>(tree.RootNode.Left, 0, new[] { 1, 2, 3 }, false, false, tree.RootNode, 4);
}
public void Delete_From_InternalNode_BorrowTheGreatestLowerBound()
{
var tree = new TTree <int>(3, 3);
tree.Add(10);
tree.Add(11);
tree.Add(12);
tree.Add(4);
tree.Add(5);
tree.Add(15);
tree.Remove(11);
CheckTree <int>(tree.RootNode, 1, new[] { 5, 10, 12 }, true, true, null, 5);
CheckTree <int>(tree.RootNode.Left, 0, new[] { 4 }, false, false, tree.RootNode, 5);
CheckTree <int>(tree.RootNode.Right, 0, new[] { 15 }, false, false, tree.RootNode, 5);
}
public void Delete_ShouldRebalance()
{
var tree = new TTree <int>(2, 3);
tree.Add(10);
tree.Add(11);
tree.Add(12);
tree.Add(1);
tree.Add(13);
tree.Add(14);
tree.Add(15);
tree.Add(16);
tree.Remove(1);
CheckTree <int>(tree.RootNode, 1, new[] { 13, 14, 15 }, true, true, null, 13);
CheckTree <int>(tree.RootNode.Left, 0, new[] { 10, 11, 12 }, false, false, tree.RootNode, 13);
CheckTree <int>(tree.RootNode.Right, 0, new[] { 16 }, false, false, tree.RootNode, 13);
}